FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

speira σπεῖρα — spi'-rah — of immediate Latin origin, but ultimately a derivative of 138 in the sense of its cognate 1507; a coil (spira, "spire"), i.e. (figuratively) a mass of men (a Roman military cohort; also (by analogy) a squad of Levitical janitors):--band.

see GREEK for 1507

see GREEK for 138